Improvement in wrenches



UNITED STATES n'rnn'r i IMPROVEMENT IN WRENCHES.

Specification forming part of Letters Patent No. l 64, 153, dated June15, 1875; application filed August 26, 1874.

To all whom it may concern Be it known that I, ISAAC W. HEYSINGER, ofPhiladelphia, county of Philadelphia and State of Pennsylvania, haveinvented certain Improvements in Slide-Wrenches, of which the followingis a specification:

My invention relates to the construction, arrangement, and combinationof parts of an improved wrench which is especially adapted to use uponcarriages and agricultural machines, and it will herein be more fullydescribed with reference to the accompanying drawings, in which- Figure1 represents a perspective view of the wrench complete, and Fig. 2a likeview of the several parts in detail.

The entire implement, with the exception of the bending-screw 0,consists of only two parts, viz., the wrench-bar A and the sliding barB, which may be cast of any suitable metal.

A is a flat bar, bearing upon one end a jaw provided with a right-angledrecess therein, as shown, and upon the other end a screwdriver, E, andit is divided into three parts by three longitudinal slot-s therein,This bar may be made stronger by being made with ribs or flangesextending down from each side edge, so as to make the under sideconcave. Its jaw may be made to stand perpendicular to its face, asshown in the drawings, or it may be made to extend laterally therefromand form what is called a flat wrench. The slot next the screw-driver ismade merely to save metal and secure lightness, the central one tofurnish a way for the stem of the screw 0 and the lug H on the slidingbar B to travel back and forth in, and the one next the fixed jaw tofurnish a way for the button F and its'neck to pass through, and thenext to travel back and forth in when the jaws of the implement areadjusted in use. The central portion of the bar is provided with teethon each side of the slot D, and these teeth are so pitched that theteeth with which the sliding bar B is provided will slide easily overthem when the jaw on sliding bar B is moved toward the jaw on A, butwill resist and prevent the two jaws being moved asunder, so that whenthe two bars A and B are held together by screw 0 the jaws are locked inposition, and will hold fast until the rear end of sliding bar B israised so as to disengage the teeth by means of the screw 0. The slidingbar B has under its rear end the lug H, which fills laterally thecentral slot D, and thus guides the sliding bar B and leaves the stem ofscrew 0 free from strain, and that bar has upon the front thereof a jawrecessed in precisely the same manner that the other jaw is. The buttonF is inserted in its slot or way by turning the slidingbarB at rightangles to the main bar, and, when inserted, the former bar is turnedback into line with the latter, and it holds the two bars lockedtogether at the point of insertion, but allows bar B free lengthwisemotion. The recesses in the jaws before described are provided, in orderthat the jaws may be inserted into the hub of a wheel, and be made tograsp the nut upon an axle and hold it with more effect and lessliability to slip OK. This form of jaw adds to its strength, but doesnot prevent the use of the wrench for general purposes, since the facesof the jaws are made broad and parallel to each other, and the recesses,therefore, do not interfere in any use of the implement.

The slot in the main bar next its jaw may be dispensed with, if deemeddesirable, and

the sliding bar be made to extend down and partly around the bar Aunderneath; but I think, in use, the construction shown in the drawingswill be found preferable.

The sliding bar B may be also extended, so that the toothed part maycome opposite the slot next to E, so that for rapid changes of gage thehand of the operator may keep the parts A and B together without the useof the screw 0. The wrench will be equally strong, however, and muchlighter in the form shown in the drawings.

The screw has the small end slightly beaten up, so that it may not comeout and get lost by carelessness. I also prefer using a flatmilled headupon the lower end of the screw, large enough to extend beyond the edgesof 2. The clamping-screw O, passing through a slot in the main bar A,into the lug-H, and the rear portion of the movable bar B, substantiallyas described.

ISAAC W. HEYSINGER.

Witnesses P. ODoNNELL, OLIVER R. LEECH. v

